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Biology Unit One
Themes in Biology, Scientific Process, MIcroscopes, Metric System
21
Biology
9th Grade
09/03/2006

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Term
Characteristics of Life
Definition
1. made up of cells
2. grow/develop
3. reproduce- pass down traits
4. metabolism- ex. food into energy
5. change over time
6. respond to stimuli
7. homeostasis
Term
unicellular
Definition
made up of one cell
Term
multicellular
Definition
made up of more than one cell
Term
reproduction
Definition
sexual- 2 parents
asexual- 1 parent
Term
metabolism
Definition
all the chemical reactions in an organism
Term
homeostasis
Definition
maintains a stable internal environment
Term
gene
Definition
inherited, one trait
Term
evolution
Definition
change over time
Term
natural selection
Definition
organisms that are best suited to their environment survive
Term
genome
Definition
all of the organism's genes
Term
steps of the scientific method
Definition
1. collect observations
2. ask a question
3. develop hypothesis (educated guess, prediction, statement)
4. Develop controlled experiment
5. analyze data/draw conclusions
6. context/verification
7. model/theory
Term
control group
Definition
standard of comparison
Term
experimental group(s)
Definition
test hypothesis
Term
independent variable
Definition
what you're testing (tested factor)

know ahead of time
Term
dependent variable
Definition
measured results (what you find out)

don't know ahead of time
Term
light microscope
Definition
magnifies an image using light
Term
electron microscope
Definition
uses electrons to create an image, greater magnification than light
Term
how to calculate magnification
Definition
multiply the 2 magnifications (ocular lens and objective lens) to get total magnification
Term
biology
Definition
the study of life
Term
ecology
Definition
the study of how organisms interact with one another and with their environment
Term
[image]
Definition
[image]
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